mirror of https://github.com/CrimsonTome/tldr.git
36 lines
895 B
Markdown
36 lines
895 B
Markdown
# ssh-keygen
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> Generate ssh keys used for authentication, password-less logins, and other things.
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- Generate a key interactively:
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`ssh-keygen`
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- Specify file in which to save the key:
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`ssh-keygen -f ~/.ssh/{{filename}}`
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- Generate an ed25519 key with 100 key derivation function rounds:
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`ssh-keygen -t ed25519 -a 100`
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- Generate an RSA 4096 bit key with email as a comment:
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`ssh-keygen -t rsa -b 4096 -C "{{email}}"`
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- Retrieve the key fingerprint from a host (useful for confirming the authenticity of the host when first connecting to it via SSH):
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`ssh-keygen -l -F {{remote_host}}`
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- Remove the keys of a host from the known_hosts file (useful when a known host has a new key):
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`ssh-keygen -R {{remote_host}}`
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- Retrieve the fingerprint of a key in MD5 Hex:
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`ssh-keygen -l -E md5 -f ~/.ssh/{{filename}}`
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- Change the password of a key:
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`ssh-keygen -p -f ~/.ssh/{{filename}}`
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